What do you need to include in your donation acknowledgment letter? A gift acknowledgment letter weaves together your nonprofit's appreciation, engagement, and compliance efforts following a donor's generosity.We will also provide nonprofit thank-you letter templates designed for various gift types to help you perfect your letters of appreciation. A donor acknowledgement letter should include a few specific items to assist the donor and help your organization comply with IRS regulations. Sample Thank You Letter 1. Set up templates that can be personalized with donorspecific details, like name and donation amount. Thank you letter and receipt. Want to learn how to write and structure donor acknowledgment letters? Check out these tips and sample letters to make a greater impact.